1 // Check that a stack unwinding algorithm works corretly even with the assembly 2 // instrumentation. 3 4 // REQUIRES: x86_64-target-arch 5 // RUN: %clangxx_asan -g -O1 %s -fno-inline-functions -fno-omit-frame-pointer -mno-omit-leaf-frame-pointer -mllvm -asan-instrument-assembly -o %t && not %run %t 2>&1 | FileCheck %s 6 // RUN: %clangxx_asan -g -O1 %s -fno-inline-functions -fomit-frame-pointer -momit-leaf-frame-pointer -mllvm -asan-instrument-assembly -o %t && not %run %t 2>&1 | FileCheck %s 7 // RUN: %clangxx_asan -g0 -O1 %s -fno-unwind-tables -fno-asynchronous-unwind-tables -fno-exceptions -fno-inline-functions -fomit-frame-pointer -momit-leaf-frame-pointer -mllvm -asan-instrument-assembly -o %t && not %run %t 2>&1 | FileCheck %s --check-prefix=CHECK-nounwind 8 9 #include <cstddef> 10 11 // CHECK: READ of size 4 12 // CHECK-NEXT: {{#0 0x[0-9a-fA-F]+ in foo}} 13 // CHECK-NEXT: {{#1 0x[0-9a-fA-F]+ in main}} 14 15 // CHECK-nounwind: READ of size 4 16 // CHECK-nounwind-NEXT: {{#0 0x[0-9a-fA-F]+ in foo}} 17 18 __attribute__((noinline)) int foo(size_t n, int *buffer) { 19 int r; 20 __asm__("movl (%[buffer], %[n], 4), %[r] \n\t" 21 : [r] "=r"(r) 22 : [buffer] "r"(buffer), [n] "r"(n) 23 : "memory"); 24 return r; 25 } 26 27 int main() { 28 const size_t n = 16; 29 int *buffer = new int[n]; 30 foo(n, buffer); 31 delete[] buffer; 32 return 0; 33 } 34
